Is there anyone who is not experiencing any issues introduced by 12.20 or 12.23 ?

1. Yes, major battery drain after update to 12.23.  No issues before that. Certainly relates to syncing with Garmin connect, goes away if disconnected from phone but that's not a fix!

Same here ..

Does crosshair show up on map in 12.23?

I updated to 12.23 from the latest beta the other day.

Since then no unusual battery drain.

The HR zones I tweaked do get saved to the watch, but training status/training effect don't seem to be tied to my custom zones. On the other hand, I also found this to be the case with my 945 and 935 so it's nothing new for me. I still find that the HR targets for recommended workouts are absurdly low, and obviously not based on my true max HR (which has always been relatively high compared to "normal" for my age). 

FWIW, I'm not having any GPS issues whatsoever after the update - which is the subject of another thread. My tracks are smooth and right where they should be.

I do get that weird dashed horizontal line in the display from time to time.

Bateria 

Looks like the watch is trying to sync for some data or update from GC.

That explains the battery drain.

I think some users also claimed that disconnecting fixes the drain.

I've had 12.23 for 3 days without problems but this morning I begin to see a battery drain.

Now it's losing more then 1% an hour where before it last 0.25 % an hour on smartwatch mode

Looks like next time I'll read the reviews about the update first before installing it.

Is it possible to somehow roll back the firmware to the previous version?

Using 955 Solar version, turned off/on the Watch after FW upgrade to 12.23 - No issues at all, not battery-drain out of the normal.

Using Beats Power Pro wireless headset, Stryd and Iphone as devices.